ZEROSUM
| Date | Clue |
|---|---|
| 2022-09-06 | Like a balanced "game," in economics |
| 2018-07-01 | Like a game with equal winners and losers |
| 2014-09-01 | Like a game with equal winners and losers |
| 2011-03-12 | Like games without win-win outcomes |
| 2000-06-02 | Like a system with equal gains and losses |